From e17f64fce70131cc1c1c04d1683dfa97b1c0c695 Mon Sep 17 00:00:00 2001
From: Andrew Wood <andrew.wood@ivarch.com>
Date: Sat, 7 Mar 2026 22:23:10 +0000
Subject: [PATCH] Allow "--size @dir" to read the size of all files under "dir"
 (#179).

---
 Makefile.am                                 |   1 +
 configure.ac                                |   2 +
 docs/pv.1                                   |  14 ++-
 docs/pv.1.md                                |  10 +-
 po/cs.po                                    |  54 +++++-----
 po/de.po                                    |  60 +++++------
 po/es.po                                    |  54 +++++-----
 po/fi.po                                    |  54 +++++-----
 po/fr.po                                    |  60 +++++------
 po/ka.po                                    |  54 +++++-----
 po/pl.po                                    |  54 +++++-----
 po/pt.po                                    |  54 +++++-----
 po/ru.po                                    |  54 +++++-----
 po/tr.po                                    |  54 +++++-----
 src/include/config.h.in                     | 110 +++++++++++---------
 src/main/options.c                          |  50 +++++++++
 tests/Modifiers_-_--size_from_dir_size.test |  67 ++++++++++++
 17 files changed, 481 insertions(+), 325 deletions(-)
 create mode 100755 tests/Modifiers_-_--size_from_dir_size.test

diff --git a/Makefile.am b/Makefile.am
index 5f00e4c..936b152 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -93,6 +93,7 @@ tests/Modifiers_-_--force.test \
 tests/Modifiers_-_--interval.test \
 tests/Modifiers_-_--line-mode.test \
 tests/Modifiers_-_--size_from_file_size.test \
+tests/Modifiers_-_--size_from_dir_size.test \
 tests/Modifiers_-_--size.test \
 tests/Modifiers_-_--sync.test \
 tests/Sparse_-_Basic.test \
diff --git a/configure.ac b/configure.ac
index 7e76e34..2e01b38 100644
--- a/configure.ac
+++ b/configure.ac
@@ -31,6 +31,7 @@ AC_CHECK_FUNCS([fpathconf sysconf posix_memalign posix_fadvise])
 AC_CHECK_FUNCS([nanosleep])
 AC_CHECK_FUNCS([setitimer])
 AC_CHECK_FUNCS([setproctitle])
+AC_CHECK_FUNCS([nftw])
 AC_CHECK_HEADERS([getopt.h])
 AC_CHECK_HEADERS([limits.h])
 AC_CHECK_HEADERS([langinfo.h])
@@ -40,6 +41,7 @@ AC_CHECK_HEADERS([libgen.h])
 AC_CHECK_HEADERS([sys/ioctl.h])
 AC_CHECK_HEADERS([libintl.h locale.h])
 AC_CHECK_HEADERS([sys/sysmacros.h])
+AC_CHECK_HEADERS([ftw.h])
 AC_CHECK_MEMBERS([struct stat.st_blksize])
 AC_CHECK_DECLS([SA_SIGINFO], [], [], [[#include <signal.h>]])
 
diff --git a/docs/pv.1 b/docs/pv.1
index 6d6f6af..fe41734 100644
--- a/docs/pv.1
+++ b/docs/pv.1
@@ -162,7 +162,8 @@ If \*(lq\fB\-\-si\fR\*(rq appears before this option, suffixes will denote
 kilobytes (*1000), megabytes, and so on instead.
 .IP
 If \fISIZE\fR starts with \*(lq\fB@\fR\*(rq, the size of file whose name
-follows the @ will be used.
+follows the @ will be used; if that is a directory, the size of all files
+under it will be used, like \*(lq\fBdu\~\-\-apparent\-size\~\-b\fR\*(rq.
 .TP
 .B \-g, \-\-gauge
 If the progress bar is shown but the size is not known, then instead of
@@ -636,6 +637,17 @@ tar cf \- directory/ \e
 .EE
 .in
 .PP
+An alternative way of doing the same thing:
+.PP
+.in +4
+.EX
+tar cf \- directory/ \e
+| pv \-\-size @directory/ \e
+| gzip \-9 \e
+> out.tar.gz
+.EE
+.in
+.PP
 Taking an image of a disk, skipping errors:
 .PP
 .in +4
diff --git a/docs/pv.1.md b/docs/pv.1.md
index 763cd35..0181e41 100644
--- a/docs/pv.1.md
+++ b/docs/pv.1.md
@@ -164,7 +164,8 @@ are explicitly switched on will be shown.
     denote kilobytes (\*1000), megabytes, and so on instead.
 
     If *SIZE* starts with "**@**", the size of file whose name follows
-    the @ will be used.
+    the @ will be used; if that is a directory, the size of all files
+    under it will be used, like "**du \--apparent-size -b**".
 
 **-g, \--gauge**
 
@@ -632,6 +633,13 @@ To watch the progress of creating a tar.gz archive:
     | gzip -9 \
     > out.tar.gz
 
+An alternative way of doing the same thing:
+
+    tar cf - directory/ \
+    | pv --size @directory/ \
+    | gzip -9 \
+    > out.tar.gz
+
 Taking an image of a disk, skipping errors:
 
     pv -EE /dev/your/disk/device > disk-image.img
diff --git a/po/cs.po b/po/cs.po
index 96b1fd9..6ac65e3 100644
--- a/po/cs.po
+++ b/po/cs.po
@@ -1,7 +1,7 @@
 msgid ""
 msgstr ""
 "Report-Msgid-Bugs-To: https://codeberg.org/ivarch/pv/issues\n"
-"POT-Creation-Date: 2025-12-15 20:10+0000\n"
+"POT-Creation-Date: 2026-03-07 22:21+0000\n"
 "PO-Revision-Date: 2024-10-13 20:43+0000\n"
 "Last-Translator: mmatous <mmatous@users.noreply.translate.codeberg.org>\n"
 "Language-Team: Czech <https://translate.codeberg.org/projects/pv/pv/cs/>\n"
@@ -293,81 +293,81 @@ msgstr "(vstup)"
 msgid "state allocation failed"
 msgstr "selhala alokace stavu"
 
-#: src/main/options.c:370
+#: src/main/options.c:373
 msgid "list files may not contain @ lines"
 msgstr ""
 
-#: src/main/options.c:391 src/main/options.c:393 src/main/options.c:807
+#: src/main/options.c:394 src/main/options.c:396 src/main/options.c:857
 msgid "process ID or pid:fd pair expected"
 msgstr "očekáváno ID procesu nebo dvojice PID:DS"
 
-#: src/main/options.c:403 src/main/options.c:405 src/main/options.c:814
+#: src/main/options.c:406 src/main/options.c:408 src/main/options.c:864
 msgid "invalid process ID"
 msgstr "neplatné ID procesu"
 
-#: src/main/options.c:448 src/pv/file.c:342
+#: src/main/options.c:475 src/pv/file.c:342
 msgid "failed to stat file"
 msgstr "nebylo možné zjistit informace o souboru"
 
-#: src/main/options.c:462
+#: src/main/options.c:511
 msgid "is a directory"
 msgstr "je adresář"
 
-#: src/main/options.c:491
+#: src/main/options.c:541
 msgid "failed to generate sysfs filename"
 msgstr "selhalo vytváření jména pro soubor v sysfs"
 
-#: src/main/options.c:513
+#: src/main/options.c:563
 msgid "failed to read sysfs size file"
 msgstr "selhalo čtení velikosti souboru v sysfs"
 
-#: src/main/options.c:533
+#: src/main/options.c:583
 msgid "failed to open block device"
 msgstr "selhalo otevření blokového zařízení"
 
-#: src/main/options.c:543
+#: src/main/options.c:593
 msgid "failed to determine size of block device"
 msgstr "selhalo zjištění velikosti blokového zařízení"
 
-#: src/main/options.c:652
+#: src/main/options.c:702
 msgid "option structure allocation failed"
 msgstr "selhala alokace struktury pro volby"
 
-#: src/main/options.c:671
+#: src/main/options.c:721
 msgid "option structure argv allocation failed"
 msgstr "selhala alokace struktury pro argv"
 
-#: src/main/options.c:723
+#: src/main/options.c:773
 msgid "numeric value not understood"
 msgstr ""
 
-#: src/main/options.c:743
+#: src/main/options.c:793
 msgid "integer argument expected"
 msgstr "očekáván celočíselný argument"
 
-#: src/main/options.c:755
+#: src/main/options.c:805
 msgid "numeric argument expected"
 msgstr "očekáván číselný argument"
 
-#: src/main/options.c:767
+#: src/main/options.c:817
 msgid "missing filename"
 msgstr ""
 
-#: src/main/options.c:795
+#: src/main/options.c:845
 msgid "missing process name"
 msgstr ""
 
-#: src/main/options.c:1056
+#: src/main/options.c:1106
 #, c-format
 msgid "Try `%s --help' for more information."
 msgstr "Zkuste `%s --help' pro více informací."
 
-#: src/main/options.c:1058
+#: src/main/options.c:1108
 #, c-format
 msgid "Try `%s -h' for more information."
 msgstr "Zkuste `%s --h' pro více informací."
 
-#: src/main/options.c:1089
+#: src/main/options.c:1139
 msgid ""
 "cannot use line mode or transfer modifier options when watching file "
 "descriptors"
@@ -375,31 +375,31 @@ msgstr ""
 "při sledování deskriptorů souborů nelze použít řádkový mód nebo volby pro "
 "modifikaci přenosu"
 
-#: src/main/options.c:1098
+#: src/main/options.c:1148
 msgid "cannot use cursor positioning when watching file descriptors"
 msgstr "při sledování deskriptorů souborů nelze pozicování kurzoru použít"
 
-#: src/main/options.c:1107
+#: src/main/options.c:1157
 msgid "cannot use remote control when watching file descriptors"
 msgstr "při sledování deskriptorů souborů nelze použít vzdálené ovládání"
 
-#: src/main/options.c:1116
+#: src/main/options.c:1166
 msgid "cannot use remote query when watching file descriptors"
 msgstr ""
 
-#: src/main/options.c:1125
+#: src/main/options.c:1175
 msgid "cannot transfer files when watching file descriptors"
 msgstr "při sledování deskriptorů souborů nelze použít přenos souborů"
 
-#: src/main/options.c:1150
+#: src/main/options.c:1200
 msgid "not available on systems without /proc/self/fdinfo"
 msgstr "není dostupné na systémech bez /proc/self/fdinfo"
 
-#: src/main/options.c:1162
+#: src/main/options.c:1212
 msgid "cannot use remote control and remote query together"
 msgstr ""
 
-#: src/main/options.c:1189
+#: src/main/options.c:1239
 msgid "files cannot be specified with this option"
 msgstr ""
 
diff --git a/po/de.po b/po/de.po
index 0b07896..0868a4a 100644
--- a/po/de.po
+++ b/po/de.po
@@ -1,7 +1,7 @@
 msgid ""
 msgstr ""
 "Report-Msgid-Bugs-To: https://codeberg.org/ivarch/pv/issues\n"
-"POT-Creation-Date: 2025-12-15 20:10+0000\n"
+"POT-Creation-Date: 2026-03-07 22:21+0000\n"
 "PO-Revision-Date: 2025-01-14 20:39+0000\n"
 "Last-Translator: Benny <benny@users.noreply.translate.codeberg.org>\n"
 "Language-Team: German <https://translate.codeberg.org/projects/pv/pv/de/>\n"
@@ -14,9 +14,9 @@ msgstr ""
 "From: Andrew Wood <ivarch@ubik>\n"
 "Xgettext-Options: --default-domain=pkgbuild --directory=./.pkgdir --add-"
 "comments --keyword=_ --keyword=N_\n"
-"Files: src/getopt/getopt.c src/getopt/getopt1.c src/version.c src/main/init."
-"c src/main/help.c src/main/xpmptr.c src/guts/load.c src/guts/stop.c src/guts/"
-"configure.c src/guts/make.c src/guts/install.c src/guts/prefs.c src/ui/"
+"Files: src/getopt/getopt.c src/getopt/getopt1.c src/version.c src/main/"
+"init.c src/main/help.c src/main/xpmptr.c src/guts/load.c src/guts/stop.c src/"
+"guts/configure.c src/guts/make.c src/guts/install.c src/guts/prefs.c src/ui/"
 "generate.c src/ui/main.c src/ui/xpm.c src/ui/status.c src/ui/activate.c src/"
 "ui/handlers/main.c src/ui/handlers/package.c src/ui/handlers/prefs.c src/ui/"
 "handlers/dirsel.c src/ui/handlers/popup.c src/ui/handlers/help.c src/ui/"
@@ -311,81 +311,81 @@ msgstr "(eingabe)"
 msgid "state allocation failed"
 msgstr "Speicherzuweisung für `state' fehlgeschlagen"
 
-#: src/main/options.c:370
+#: src/main/options.c:373
 msgid "list files may not contain @ lines"
 msgstr ""
 
-#: src/main/options.c:391 src/main/options.c:393 src/main/options.c:807
+#: src/main/options.c:394 src/main/options.c:396 src/main/options.c:857
 msgid "process ID or pid:fd pair expected"
 msgstr "Prozess-ID oder PID:FD-Paar erwartet"
 
-#: src/main/options.c:403 src/main/options.c:405 src/main/options.c:814
+#: src/main/options.c:406 src/main/options.c:408 src/main/options.c:864
 msgid "invalid process ID"
 msgstr "ungültige Prozess-ID"
 
-#: src/main/options.c:448 src/pv/file.c:342
+#: src/main/options.c:475 src/pv/file.c:342
 msgid "failed to stat file"
 msgstr "konnte Dateiinformationen nicht lesen"
 
-#: src/main/options.c:462
+#: src/main/options.c:511
 msgid "is a directory"
 msgstr "ist ein Verzeichnis"
 
-#: src/main/options.c:491
+#: src/main/options.c:541
 msgid "failed to generate sysfs filename"
 msgstr "konnte Sysfs-Dateinamen nicht erzeugen"
 
-#: src/main/options.c:513
+#: src/main/options.c:563
 msgid "failed to read sysfs size file"
 msgstr "konnte Größe der Sysfs-Datei nicht lesen"
 
-#: src/main/options.c:533
+#: src/main/options.c:583
 msgid "failed to open block device"
 msgstr "konnte Blockgerät nicht öffnen"
 
-#: src/main/options.c:543
+#: src/main/options.c:593
 msgid "failed to determine size of block device"
 msgstr "konnte Größe des Blockgeräts nicht ermitteln"
 
-#: src/main/options.c:652
+#: src/main/options.c:702
 msgid "option structure allocation failed"
 msgstr "Speicherzuweisung für `option' fehlgeschlagen"
 
-#: src/main/options.c:671
+#: src/main/options.c:721
 msgid "option structure argv allocation failed"
 msgstr "Speicherzuweisung für `argv' der Option fehlgeschlagen"
 
-#: src/main/options.c:723
+#: src/main/options.c:773
 msgid "numeric value not understood"
 msgstr "numerischen Wert nicht verstanden"
 
-#: src/main/options.c:743
+#: src/main/options.c:793
 msgid "integer argument expected"
 msgstr "Ganzzahliges Argument erwartet"
 
-#: src/main/options.c:755
+#: src/main/options.c:805
 msgid "numeric argument expected"
 msgstr "numerisches Argument erwartet"
 
-#: src/main/options.c:767
+#: src/main/options.c:817
 msgid "missing filename"
 msgstr ""
 
-#: src/main/options.c:795
+#: src/main/options.c:845
 msgid "missing process name"
 msgstr ""
 
-#: src/main/options.c:1056
+#: src/main/options.c:1106
 #, c-format
 msgid "Try `%s --help' for more information."
 msgstr "`%s --help' zeigt weitere Informationen an."
 
-#: src/main/options.c:1058
+#: src/main/options.c:1108
 #, c-format
 msgid "Try `%s -h' for more information."
 msgstr "`%s -h' zeigt weitere Informationen an."
 
-#: src/main/options.c:1089
+#: src/main/options.c:1139
 msgid ""
 "cannot use line mode or transfer modifier options when watching file "
 "descriptors"
@@ -393,36 +393,36 @@ msgstr ""
 "Beim Beobachten von Dateideskriptoren können keine Optionen für den "
 "Zeilenmodus oder den Übertragungsmodifikator verwendet werden"
 
-#: src/main/options.c:1098
+#: src/main/options.c:1148
 msgid "cannot use cursor positioning when watching file descriptors"
 msgstr ""
 "Beim Beobachten von Dateideskriptoren kann Cursor-Positionierung nicht "
 "verwendet werden"
 
-#: src/main/options.c:1107
+#: src/main/options.c:1157
 msgid "cannot use remote control when watching file descriptors"
 msgstr ""
 "Beim Beobachten von Dateideskriptoren kann die Fernbedienung nicht verwenden "
 "werden"
 
-#: src/main/options.c:1116
+#: src/main/options.c:1166
 msgid "cannot use remote query when watching file descriptors"
 msgstr ""
 
-#: src/main/options.c:1125
+#: src/main/options.c:1175
 msgid "cannot transfer files when watching file descriptors"
 msgstr ""
 "Beim Beobachten von Dateideskriptoren können Dateien nicht übertragen werden"
 
-#: src/main/options.c:1150
+#: src/main/options.c:1200
 msgid "not available on systems without /proc/self/fdinfo"
 msgstr "Nicht verfügbar auf Systemen ohne /proc/self/fdinfo"
 
-#: src/main/options.c:1162
+#: src/main/options.c:1212
 msgid "cannot use remote control and remote query together"
 msgstr ""
 
-#: src/main/options.c:1189
+#: src/main/options.c:1239
 msgid "files cannot be specified with this option"
 msgstr ""
 
diff --git a/po/es.po b/po/es.po
index e7b9d75..cb28e58 100644
--- a/po/es.po
+++ b/po/es.po
@@ -1,7 +1,7 @@
 msgid ""
 msgstr ""
 "Report-Msgid-Bugs-To: https://codeberg.org/ivarch/pv/issues\n"
-"POT-Creation-Date: 2025-12-15 20:10+0000\n"
+"POT-Creation-Date: 2026-03-07 22:21+0000\n"
 "Language: es\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
@@ -287,111 +287,111 @@ msgstr ""
 msgid "state allocation failed"
 msgstr ""
 
-#: src/main/options.c:370
+#: src/main/options.c:373
 msgid "list files may not contain @ lines"
 msgstr ""
 
-#: src/main/options.c:391 src/main/options.c:393 src/main/options.c:807
+#: src/main/options.c:394 src/main/options.c:396 src/main/options.c:857
 msgid "process ID or pid:fd pair expected"
 msgstr ""
 
-#: src/main/options.c:403 src/main/options.c:405 src/main/options.c:814
+#: src/main/options.c:406 src/main/options.c:408 src/main/options.c:864
 msgid "invalid process ID"
 msgstr ""
 
-#: src/main/options.c:448 src/pv/file.c:342
+#: src/main/options.c:475 src/pv/file.c:342
 msgid "failed to stat file"
 msgstr ""
 
-#: src/main/options.c:462
+#: src/main/options.c:511
 msgid "is a directory"
 msgstr ""
 
-#: src/main/options.c:491
+#: src/main/options.c:541
 msgid "failed to generate sysfs filename"
 msgstr ""
 
-#: src/main/options.c:513
+#: src/main/options.c:563
 msgid "failed to read sysfs size file"
 msgstr ""
 
-#: src/main/options.c:533
+#: src/main/options.c:583
 msgid "failed to open block device"
 msgstr ""
 
-#: src/main/options.c:543
+#: src/main/options.c:593
 msgid "failed to determine size of block device"
 msgstr ""
 
-#: src/main/options.c:652
+#: src/main/options.c:702
 msgid "option structure allocation failed"
 msgstr ""
 
-#: src/main/options.c:671
+#: src/main/options.c:721
 msgid "option structure argv allocation failed"
 msgstr ""
 
-#: src/main/options.c:723
+#: src/main/options.c:773
 msgid "numeric value not understood"
 msgstr ""
 
-#: src/main/options.c:743
+#: src/main/options.c:793
 msgid "integer argument expected"
 msgstr ""
 
-#: src/main/options.c:755
+#: src/main/options.c:805
 msgid "numeric argument expected"
 msgstr ""
 
-#: src/main/options.c:767
+#: src/main/options.c:817
 msgid "missing filename"
 msgstr ""
 
-#: src/main/options.c:795
+#: src/main/options.c:845
 msgid "missing process name"
 msgstr ""
 
-#: src/main/options.c:1056
+#: src/main/options.c:1106
 #, c-format
 msgid "Try `%s --help' for more information."
 msgstr ""
 
-#: src/main/options.c:1058
+#: src/main/options.c:1108
 #, c-format
 msgid "Try `%s -h' for more information."
 msgstr ""
 
-#: src/main/options.c:1089
+#: src/main/options.c:1139
 msgid ""
 "cannot use line mode or transfer modifier options when watching file "
 "descriptors"
 msgstr ""
 
-#: src/main/options.c:1098
+#: src/main/options.c:1148
 msgid "cannot use cursor positioning when watching file descriptors"
 msgstr ""
 
-#: src/main/options.c:1107
+#: src/main/options.c:1157
 msgid "cannot use remote control when watching file descriptors"
 msgstr ""
 
-#: src/main/options.c:1116
+#: src/main/options.c:1166
 msgid "cannot use remote query when watching file descriptors"
 msgstr ""
 
-#: src/main/options.c:1125
+#: src/main/options.c:1175
 msgid "cannot transfer files when watching file descriptors"
 msgstr ""
 
-#: src/main/options.c:1150
+#: src/main/options.c:1200
 msgid "not available on systems without /proc/self/fdinfo"
 msgstr ""
 
-#: src/main/options.c:1162
+#: src/main/options.c:1212
 msgid "cannot use remote control and remote query together"
 msgstr ""
 
-#: src/main/options.c:1189
+#: src/main/options.c:1239
 msgid "files cannot be specified with this option"
 msgstr ""
 
diff --git a/po/fi.po b/po/fi.po
index 8e23122..ccc159d 100644
--- a/po/fi.po
+++ b/po/fi.po
@@ -2,7 +2,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: pv 1.9.34\n"
 "Report-Msgid-Bugs-To: https://codeberg.org/ivarch/pv/issues\n"
-"POT-Creation-Date: 2025-12-15 20:10+0000\n"
+"POT-Creation-Date: 2026-03-07 22:21+0000\n"
 "PO-Revision-Date: 2025-11-22 15:06+0000\n"
 "Last-Translator: artnay <artnay@noreply.codeberg.org>\n"
 "Language-Team: Finnish <https://translate.codeberg.org/projects/pv/pv/fi/>\n"
@@ -295,111 +295,111 @@ msgstr ""
 msgid "state allocation failed"
 msgstr ""
 
-#: src/main/options.c:370
+#: src/main/options.c:373
 msgid "list files may not contain @ lines"
 msgstr ""
 
-#: src/main/options.c:391 src/main/options.c:393 src/main/options.c:807
+#: src/main/options.c:394 src/main/options.c:396 src/main/options.c:857
 msgid "process ID or pid:fd pair expected"
 msgstr ""
 
-#: src/main/options.c:403 src/main/options.c:405 src/main/options.c:814
+#: src/main/options.c:406 src/main/options.c:408 src/main/options.c:864
 msgid "invalid process ID"
 msgstr "virheellinen prosessin ID"
 
-#: src/main/options.c:448 src/pv/file.c:342
+#: src/main/options.c:475 src/pv/file.c:342
 msgid "failed to stat file"
 msgstr ""
 
-#: src/main/options.c:462
+#: src/main/options.c:511
 msgid "is a directory"
 msgstr "on hakemisto"
 
-#: src/main/options.c:491
+#: src/main/options.c:541
 msgid "failed to generate sysfs filename"
 msgstr ""
 
-#: src/main/options.c:513
+#: src/main/options.c:563
 msgid "failed to read sysfs size file"
 msgstr ""
 
-#: src/main/options.c:533
+#: src/main/options.c:583
 msgid "failed to open block device"
 msgstr "lohkolaitteen avaaminen epäonnistui"
 
-#: src/main/options.c:543
+#: src/main/options.c:593
 msgid "failed to determine size of block device"
 msgstr "lohkolaitteen koon päättely epäonnistui"
 
-#: src/main/options.c:652
+#: src/main/options.c:702
 msgid "option structure allocation failed"
 msgstr ""
 
-#: src/main/options.c:671
+#: src/main/options.c:721
 msgid "option structure argv allocation failed"
 msgstr ""
 
-#: src/main/options.c:723
+#: src/main/options.c:773
 msgid "numeric value not understood"
 msgstr "numeerista arvoa ei ymmärretty"
 
-#: src/main/options.c:743
+#: src/main/options.c:793
 msgid "integer argument expected"
 msgstr ""
 
-#: src/main/options.c:755
+#: src/main/options.c:805
 msgid "numeric argument expected"
 msgstr ""
 
-#: src/main/options.c:767
+#: src/main/options.c:817
 msgid "missing filename"
 msgstr "puuttuva tiedostonimi"
 
-#: src/main/options.c:795
+#: src/main/options.c:845
 msgid "missing process name"
 msgstr "puuttuva prosessinimi"
 
-#: src/main/options.c:1056
+#: src/main/options.c:1106
 #, c-format
 msgid "Try `%s --help' for more information."
 msgstr "Suorita `%s --help' saadaksesi lisätietoja."
 
-#: src/main/options.c:1058
+#: src/main/options.c:1108
 #, c-format
 msgid "Try `%s -h' for more information."
 msgstr "Suorita `%s -h' saadaksesi lisätietoja."
 
-#: src/main/options.c:1089
+#: src/main/options.c:1139
 msgid ""
 "cannot use line mode or transfer modifier options when watching file "
 "descriptors"
 msgstr ""
 
-#: src/main/options.c:1098
+#: src/main/options.c:1148
 msgid "cannot use cursor positioning when watching file descriptors"
 msgstr ""
 
-#: src/main/options.c:1107
+#: src/main/options.c:1157
 msgid "cannot use remote control when watching file descriptors"
 msgstr ""
 
-#: src/main/options.c:1116
+#: src/main/options.c:1166
 msgid "cannot use remote query when watching file descriptors"
 msgstr ""
 
-#: src/main/options.c:1125
+#: src/main/options.c:1175
 msgid "cannot transfer files when watching file descriptors"
 msgstr ""
 
-#: src/main/options.c:1150
+#: src/main/options.c:1200
 msgid "not available on systems without /proc/self/fdinfo"
 msgstr ""
 
-#: src/main/options.c:1162
+#: src/main/options.c:1212
 msgid "cannot use remote control and remote query together"
 msgstr ""
 
-#: src/main/options.c:1189
+#: src/main/options.c:1239
 msgid "files cannot be specified with this option"
 msgstr ""
 
diff --git a/po/fr.po b/po/fr.po
index 768caf3..b224898 100644
--- a/po/fr.po
+++ b/po/fr.po
@@ -1,7 +1,7 @@
 msgid ""
 msgstr ""
 "Report-Msgid-Bugs-To: https://codeberg.org/ivarch/pv/issues\n"
-"POT-Creation-Date: 2025-12-15 20:10+0000\n"
+"POT-Creation-Date: 2026-03-07 22:21+0000\n"
 "PO-Revision-Date: 2025-05-31 08:58+0000\n"
 "Last-Translator: milimarg <milimarg@noreply.codeberg.org>\n"
 "Language-Team: French <https://translate.codeberg.org/projects/pv/pv/fr/>\n"
@@ -14,9 +14,9 @@ msgstr ""
 "From: Andrew Wood <ivarch@ubik>\n"
 "Xgettext-Options: --default-domain=pkgbuild --directory=./.pkgdir --add-"
 "comments --keyword=_ --keyword=N_\n"
-"Files: src/getopt/getopt.c src/getopt/getopt1.c src/version.c src/main/init."
-"c src/main/help.c src/main/xpmptr.c src/guts/load.c src/guts/stop.c src/guts/"
-"configure.c src/guts/make.c src/guts/install.c src/guts/prefs.c src/ui/"
+"Files: src/getopt/getopt.c src/getopt/getopt1.c src/version.c src/main/"
+"init.c src/main/help.c src/main/xpmptr.c src/guts/load.c src/guts/stop.c src/"
+"guts/configure.c src/guts/make.c src/guts/install.c src/guts/prefs.c src/ui/"
 "generate.c src/ui/main.c src/ui/xpm.c src/ui/status.c src/ui/activate.c src/"
 "ui/handlers/main.c src/ui/handlers/package.c src/ui/handlers/prefs.c src/ui/"
 "handlers/dirsel.c src/ui/handlers/popup.c src/ui/handlers/help.c src/ui/"
@@ -312,81 +312,81 @@ msgstr "(entrée)"
 msgid "state allocation failed"
 msgstr "échec de l'allocation de mémoire de condition"
 
-#: src/main/options.c:370
+#: src/main/options.c:373
 msgid "list files may not contain @ lines"
 msgstr ""
 
-#: src/main/options.c:391 src/main/options.c:393 src/main/options.c:807
+#: src/main/options.c:394 src/main/options.c:396 src/main/options.c:857
 msgid "process ID or pid:fd pair expected"
 msgstr "ID de processus ou paire pid:fd attendue"
 
-#: src/main/options.c:403 src/main/options.c:405 src/main/options.c:814
+#: src/main/options.c:406 src/main/options.c:408 src/main/options.c:864
 msgid "invalid process ID"
 msgstr "ID de processus non valide"
 
-#: src/main/options.c:448 src/pv/file.c:342
+#: src/main/options.c:475 src/pv/file.c:342
 msgid "failed to stat file"
 msgstr "échec à statuer sur le fichier"
 
-#: src/main/options.c:462
+#: src/main/options.c:511
 msgid "is a directory"
 msgstr "est un répertoire"
 
-#: src/main/options.c:491
+#: src/main/options.c:541
 msgid "failed to generate sysfs filename"
 msgstr "échec de génération du nom de fichier sysfs"
 
-#: src/main/options.c:513
+#: src/main/options.c:563
 msgid "failed to read sysfs size file"
 msgstr "échec de la lecture de la taille du fichier sysfs"
 
-#: src/main/options.c:533
+#: src/main/options.c:583
 msgid "failed to open block device"
 msgstr "échec de l'ouverture du périphérique de bloc"
 
-#: src/main/options.c:543
+#: src/main/options.c:593
 msgid "failed to determine size of block device"
 msgstr "échec de l'évaluation de la taille du périphérique de bloc"
 
-#: src/main/options.c:652
+#: src/main/options.c:702
 msgid "option structure allocation failed"
 msgstr "l'allocation pour la structure d'une option a échoué"
 
-#: src/main/options.c:671
+#: src/main/options.c:721
 msgid "option structure argv allocation failed"
 msgstr "l'allocation pour la structure de l'option argv a échoué"
 
-#: src/main/options.c:723
+#: src/main/options.c:773
 msgid "numeric value not understood"
 msgstr "valeur numérique non comprise"
 
-#: src/main/options.c:743
+#: src/main/options.c:793
 msgid "integer argument expected"
 msgstr "Valeur entière attendue"
 
-#: src/main/options.c:755
+#: src/main/options.c:805
 msgid "numeric argument expected"
 msgstr "Valeur numérique attendue"
 
-#: src/main/options.c:767
+#: src/main/options.c:817
 msgid "missing filename"
 msgstr ""
 
-#: src/main/options.c:795
+#: src/main/options.c:845
 msgid "missing process name"
 msgstr ""
 
-#: src/main/options.c:1056
+#: src/main/options.c:1106
 #, c-format
 msgid "Try `%s --help' for more information."
 msgstr "Essayez `%s --help' pour plus d'informations."
 
-#: src/main/options.c:1058
+#: src/main/options.c:1108
 #, c-format
 msgid "Try `%s -h' for more information."
 msgstr "Essayez `%s -h' pour plus d'informations."
 
-#: src/main/options.c:1089
+#: src/main/options.c:1139
 msgid ""
 "cannot use line mode or transfer modifier options when watching file "
 "descriptors"
@@ -394,37 +394,37 @@ msgstr ""
 "impossible d'utiliser le mode ligne ou les options de modificateur de "
 "transfert lors de la visualisation des descripteurs de fichiers"
 
-#: src/main/options.c:1098
+#: src/main/options.c:1148
 msgid "cannot use cursor positioning when watching file descriptors"
 msgstr ""
 "impossible d'utiliser le positionnement du curseur lors de la visualisation "
 "des descripteurs de fichier"
 
-#: src/main/options.c:1107
+#: src/main/options.c:1157
 msgid "cannot use remote control when watching file descriptors"
 msgstr ""
 "impossible d'utiliser la télécommande lors de la visualisation des "
 "descripteurs de fichiers"
 
-#: src/main/options.c:1116
+#: src/main/options.c:1166
 msgid "cannot use remote query when watching file descriptors"
 msgstr ""
 
-#: src/main/options.c:1125
+#: src/main/options.c:1175
 msgid "cannot transfer files when watching file descriptors"
 msgstr ""
 "impossible de transférer des fichiers lorsque vous regardez des descripteurs "
 "de fichiers"
 
-#: src/main/options.c:1150
+#: src/main/options.c:1200
 msgid "not available on systems without /proc/self/fdinfo"
 msgstr "non disponible sur les systèmes sans /proc/self/fdinfo"
 
-#: src/main/options.c:1162
+#: src/main/options.c:1212
 msgid "cannot use remote control and remote query together"
 msgstr ""
 
-#: src/main/options.c:1189
+#: src/main/options.c:1239
 msgid "files cannot be specified with this option"
 msgstr ""
 
diff --git a/po/ka.po b/po/ka.po
index e065a9f..df2428f 100644
--- a/po/ka.po
+++ b/po/ka.po
@@ -2,7 +2,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: pv 1.9.34\n"
 "Report-Msgid-Bugs-To: https://codeberg.org/ivarch/pv/issues\n"
-"POT-Creation-Date: 2025-12-15 20:10+0000\n"
+"POT-Creation-Date: 2026-03-07 22:21+0000\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -291,111 +291,111 @@ msgstr ""
 msgid "state allocation failed"
 msgstr ""
 
-#: src/main/options.c:370
+#: src/main/options.c:373
 msgid "list files may not contain @ lines"
 msgstr ""
 
-#: src/main/options.c:391 src/main/options.c:393 src/main/options.c:807
+#: src/main/options.c:394 src/main/options.c:396 src/main/options.c:857
 msgid "process ID or pid:fd pair expected"
 msgstr ""
 
-#: src/main/options.c:403 src/main/options.c:405 src/main/options.c:814
+#: src/main/options.c:406 src/main/options.c:408 src/main/options.c:864
 msgid "invalid process ID"
 msgstr ""
 
-#: src/main/options.c:448 src/pv/file.c:342
+#: src/main/options.c:475 src/pv/file.c:342
 msgid "failed to stat file"
 msgstr ""
 
-#: src/main/options.c:462
+#: src/main/options.c:511
 msgid "is a directory"
 msgstr ""
 
-#: src/main/options.c:491
+#: src/main/options.c:541
 msgid "failed to generate sysfs filename"
 msgstr ""
 
-#: src/main/options.c:513
+#: src/main/options.c:563
 msgid "failed to read sysfs size file"
 msgstr ""
 
-#: src/main/options.c:533
+#: src/main/options.c:583
 msgid "failed to open block device"
 msgstr ""
 
-#: src/main/options.c:543
+#: src/main/options.c:593
 msgid "failed to determine size of block device"
 msgstr ""
 
-#: src/main/options.c:652
+#: src/main/options.c:702
 msgid "option structure allocation failed"
 msgstr ""
 
-#: src/main/options.c:671
+#: src/main/options.c:721
 msgid "option structure argv allocation failed"
 msgstr ""
 
-#: src/main/options.c:723
+#: src/main/options.c:773
 msgid "numeric value not understood"
 msgstr ""
 
-#: src/main/options.c:743
+#: src/main/options.c:793
 msgid "integer argument expected"
 msgstr ""
 
-#: src/main/options.c:755
+#: src/main/options.c:805
 msgid "numeric argument expected"
 msgstr ""
 
-#: src/main/options.c:767
+#: src/main/options.c:817
 msgid "missing filename"
 msgstr ""
 
-#: src/main/options.c:795
+#: src/main/options.c:845
 msgid "missing process name"
 msgstr ""
 
-#: src/main/options.c:1056
+#: src/main/options.c:1106
 #, c-format
 msgid "Try `%s --help' for more information."
 msgstr ""
 
-#: src/main/options.c:1058
+#: src/main/options.c:1108
 #, c-format
 msgid "Try `%s -h' for more information."
 msgstr ""
 
-#: src/main/options.c:1089
+#: src/main/options.c:1139
 msgid ""
 "cannot use line mode or transfer modifier options when watching file "
 "descriptors"
 msgstr ""
 
-#: src/main/options.c:1098
+#: src/main/options.c:1148
 msgid "cannot use cursor positioning when watching file descriptors"
 msgstr ""
 
-#: src/main/options.c:1107
+#: src/main/options.c:1157
 msgid "cannot use remote control when watching file descriptors"
 msgstr ""
 
-#: src/main/options.c:1116
+#: src/main/options.c:1166
 msgid "cannot use remote query when watching file descriptors"
 msgstr ""
 
-#: src/main/options.c:1125
+#: src/main/options.c:1175
 msgid "cannot transfer files when watching file descriptors"
 msgstr ""
 
-#: src/main/options.c:1150
+#: src/main/options.c:1200
 msgid "not available on systems without /proc/self/fdinfo"
 msgstr ""
 
-#: src/main/options.c:1162
+#: src/main/options.c:1212
 msgid "cannot use remote control and remote query together"
 msgstr ""
 
-#: src/main/options.c:1189
+#: src/main/options.c:1239
 msgid "files cannot be specified with this option"
 msgstr ""
 
diff --git a/po/pl.po b/po/pl.po
index 9f2b74e..cc4d955 100644
--- a/po/pl.po
+++ b/po/pl.po
@@ -6,7 +6,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: https://codeberg.org/ivarch/pv/issues\n"
-"POT-Creation-Date: 2025-12-15 20:10+0000\n"
+"POT-Creation-Date: 2026-03-07 22:21+0000\n"
 "PO-Revision-Date: 2025-10-02 13:23+0000\n"
 "Last-Translator: Coral Pink <coralpink@noreply.codeberg.org>\n"
 "Language-Team: Polish <https://translate.codeberg.org/projects/pv/pv/pl/>\n"
@@ -306,81 +306,81 @@ msgstr "(wejście)"
 msgid "state allocation failed"
 msgstr "alokacja stanu programu nie powiodła się"
 
-#: src/main/options.c:370
+#: src/main/options.c:373
 msgid "list files may not contain @ lines"
 msgstr ""
 
-#: src/main/options.c:391 src/main/options.c:393 src/main/options.c:807
+#: src/main/options.c:394 src/main/options.c:396 src/main/options.c:857
 msgid "process ID or pid:fd pair expected"
 msgstr "oczekiwany proces ID lub para PID:FD"
 
-#: src/main/options.c:403 src/main/options.c:405 src/main/options.c:814
+#: src/main/options.c:406 src/main/options.c:408 src/main/options.c:864
 msgid "invalid process ID"
 msgstr "niepoprawne ID procesu"
 
-#: src/main/options.c:448 src/pv/file.c:342
+#: src/main/options.c:475 src/pv/file.c:342
 msgid "failed to stat file"
 msgstr "nie udało się wykonać operacji stat na pliku"
 
-#: src/main/options.c:462
+#: src/main/options.c:511
 msgid "is a directory"
 msgstr "jest katalogiem"
 
-#: src/main/options.c:491
+#: src/main/options.c:541
 msgid "failed to generate sysfs filename"
 msgstr "nie udało się wygenerować nazwy pliku dla sysfs"
 
-#: src/main/options.c:513
+#: src/main/options.c:563
 msgid "failed to read sysfs size file"
 msgstr "nie udało się odczytać rozmiaru pliku sysfs"
 
-#: src/main/options.c:533
+#: src/main/options.c:583
 msgid "failed to open block device"
 msgstr "nie udało się otworzyć urządzenia blokowego"
 
-#: src/main/options.c:543
+#: src/main/options.c:593
 msgid "failed to determine size of block device"
 msgstr "nie udało się ustalić rozmiaru urządzenia blokowego"
 
-#: src/main/options.c:652
+#: src/main/options.c:702
 msgid "option structure allocation failed"
 msgstr "nie udało się zaalokować struktur opcji"
 
-#: src/main/options.c:671
+#: src/main/options.c:721
 msgid "option structure argv allocation failed"
 msgstr "nie udało się zaalokować struktur opcji argv"
 
-#: src/main/options.c:723
+#: src/main/options.c:773
 msgid "numeric value not understood"
 msgstr "wartość liczbowa niezrozumiana"
 
-#: src/main/options.c:743
+#: src/main/options.c:793
 msgid "integer argument expected"
 msgstr "oczekiwany argument typu liczby całkowitej"
 
-#: src/main/options.c:755
+#: src/main/options.c:805
 msgid "numeric argument expected"
 msgstr "oczekiwany argument liczbowy"
 
-#: src/main/options.c:767
+#: src/main/options.c:817
 msgid "missing filename"
 msgstr ""
 
-#: src/main/options.c:795
+#: src/main/options.c:845
 msgid "missing process name"
 msgstr ""
 
-#: src/main/options.c:1056
+#: src/main/options.c:1106
 #, c-format
 msgid "Try `%s --help' for more information."
 msgstr "Spróbuj `%s --help' by uzyskać więcej informacji."
 
-#: src/main/options.c:1058
+#: src/main/options.c:1108
 #, c-format
 msgid "Try `%s -h' for more information."
 msgstr "Spróbuj `%s -h' by uzyskać więcej informacji."
 
-#: src/main/options.c:1089
+#: src/main/options.c:1139
 msgid ""
 "cannot use line mode or transfer modifier options when watching file "
 "descriptors"
@@ -388,35 +388,35 @@ msgstr ""
 "nie można użyć trybu zliczania linii lub opcji modyfikujących przesył "
 "łącznie z opcją obserwowania deskryptorów plików"
 
-#: src/main/options.c:1098
+#: src/main/options.c:1148
 msgid "cannot use cursor positioning when watching file descriptors"
 msgstr ""
 "nie można użyć pozycjonowania kursora łącznie z opcją obserwowania "
 "deskryptorów plików"
 
-#: src/main/options.c:1107
+#: src/main/options.c:1157
 msgid "cannot use remote control when watching file descriptors"
 msgstr ""
 "nie można użyć opcji zaktualizowania ustawień procesu łącznie z opcją "
 "obserwowania deskryptorów plików"
 
-#: src/main/options.c:1116
+#: src/main/options.c:1166
 msgid "cannot use remote query when watching file descriptors"
 msgstr ""
 
-#: src/main/options.c:1125
+#: src/main/options.c:1175
 msgid "cannot transfer files when watching file descriptors"
 msgstr "nie można przesyłać plików z opcją obserwowania deskryptorów plików"
 
-#: src/main/options.c:1150
+#: src/main/options.c:1200
 msgid "not available on systems without /proc/self/fdinfo"
 msgstr "niedostępne na systemach bez /proc/self/fdinfo"
 
-#: src/main/options.c:1162
+#: src/main/options.c:1212
 msgid "cannot use remote control and remote query together"
 msgstr ""
 
-#: src/main/options.c:1189
+#: src/main/options.c:1239
 msgid "files cannot be specified with this option"
 msgstr ""
 
diff --git a/po/pt.po b/po/pt.po
index ba890ea..c5f3594 100644
--- a/po/pt.po
+++ b/po/pt.po
@@ -6,7 +6,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: https://codeberg.org/ivarch/pv/issues\n"
-"POT-Creation-Date: 2025-12-15 20:10+0000\n"
+"POT-Creation-Date: 2026-03-07 22:21+0000\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -297,81 +297,81 @@ msgstr ""
 msgid "state allocation failed"
 msgstr "alocação de memória de status falhou"
 
-#: src/main/options.c:370
+#: src/main/options.c:373
 msgid "list files may not contain @ lines"
 msgstr ""
 
-#: src/main/options.c:391 src/main/options.c:393 src/main/options.c:807
+#: src/main/options.c:394 src/main/options.c:396 src/main/options.c:857
 msgid "process ID or pid:fd pair expected"
 msgstr "ID do processo ou par pid:fd esperado"
 
-#: src/main/options.c:403 src/main/options.c:405 src/main/options.c:814
+#: src/main/options.c:406 src/main/options.c:408 src/main/options.c:864
 msgid "invalid process ID"
 msgstr "ID de processo inválido"
 
-#: src/main/options.c:448 src/pv/file.c:342
+#: src/main/options.c:475 src/pv/file.c:342
 msgid "failed to stat file"
 msgstr "erro obtendo informações do arquivo"
 
-#: src/main/options.c:462
+#: src/main/options.c:511
 msgid "is a directory"
 msgstr ""
 
-#: src/main/options.c:491
+#: src/main/options.c:541
 msgid "failed to generate sysfs filename"
 msgstr ""
 
-#: src/main/options.c:513
+#: src/main/options.c:563
 msgid "failed to read sysfs size file"
 msgstr ""
 
-#: src/main/options.c:533
+#: src/main/options.c:583
 msgid "failed to open block device"
 msgstr ""
 
-#: src/main/options.c:543
+#: src/main/options.c:593
 msgid "failed to determine size of block device"
 msgstr ""
 
-#: src/main/options.c:652
+#: src/main/options.c:702
 msgid "option structure allocation failed"
 msgstr "erro na alocação da estrutura de opções"
 
-#: src/main/options.c:671
+#: src/main/options.c:721
 msgid "option structure argv allocation failed"
 msgstr "erro na alocação da estrutura de opções argv"
 
-#: src/main/options.c:723
+#: src/main/options.c:773
 msgid "numeric value not understood"
 msgstr ""
 
-#: src/main/options.c:743
+#: src/main/options.c:793
 msgid "integer argument expected"
 msgstr "argumento inteiro esperado"
 
-#: src/main/options.c:755
+#: src/main/options.c:805
 msgid "numeric argument expected"
 msgstr "argumento numérico esperado"
 
-#: src/main/options.c:767
+#: src/main/options.c:817
 msgid "missing filename"
 msgstr ""
 
-#: src/main/options.c:795
+#: src/main/options.c:845
 msgid "missing process name"
 msgstr ""
 
-#: src/main/options.c:1056
+#: src/main/options.c:1106
 #, c-format
 msgid "Try `%s --help' for more information."
 msgstr "Tente `%s --help' para maiores informações."
 
-#: src/main/options.c:1058
+#: src/main/options.c:1108
 #, c-format
 msgid "Try `%s -h' for more information."
 msgstr "Tente `%s -h' para maiores informações."
 
-#: src/main/options.c:1089
+#: src/main/options.c:1139
 msgid ""
 "cannot use line mode or transfer modifier options when watching file "
 "descriptors"
@@ -379,33 +379,33 @@ msgstr ""
 "não pode usar o modo de linha ou opções de modificador de transferência ao "
 "assistir os descritores de arquivo"
 
-#: src/main/options.c:1098
+#: src/main/options.c:1148
 msgid "cannot use cursor positioning when watching file descriptors"
 msgstr ""
 "não pode usar o posicionamento do cursor ao observar os descritores de "
 "arquivo"
 
-#: src/main/options.c:1107
+#: src/main/options.c:1157
 msgid "cannot use remote control when watching file descriptors"
 msgstr "não pode usar o controle remoto ao assistir os descritores de arquivo"
 
-#: src/main/options.c:1116
+#: src/main/options.c:1166
 msgid "cannot use remote query when watching file descriptors"
 msgstr ""
 
-#: src/main/options.c:1125
+#: src/main/options.c:1175
 msgid "cannot transfer files when watching file descriptors"
 msgstr "não pode transferir arquivos ao assistir descritores de arquivo"
 
-#: src/main/options.c:1150
+#: src/main/options.c:1200
 msgid "not available on systems without /proc/self/fdinfo"
 msgstr "não disponível em sistemas sem /proc/self/fdinfo"
 
-#: src/main/options.c:1162
+#: src/main/options.c:1212
 msgid "cannot use remote control and remote query together"
 msgstr ""
 
-#: src/main/options.c:1189
+#: src/main/options.c:1239
 msgid "files cannot be specified with this option"
 msgstr ""
 
diff --git a/po/ru.po b/po/ru.po
index e83e9c4..3e84ac5 100644
--- a/po/ru.po
+++ b/po/ru.po
@@ -1,7 +1,7 @@
 msgid ""
 msgstr ""
 "Report-Msgid-Bugs-To: https://codeberg.org/ivarch/pv/issues\n"
-"POT-Creation-Date: 2025-12-15 20:10+0000\n"
+"POT-Creation-Date: 2026-03-07 22:21+0000\n"
 "PO-Revision-Date: 2025-01-15 19:08+0000\n"
 "Last-Translator: 0ko <0ko@users.noreply.translate.codeberg.org>\n"
 "Language-Team: Russian <https://translate.codeberg.org/projects/pv/pv/ru/>\n"
@@ -294,111 +294,111 @@ msgstr "(ввод)"
 msgid "state allocation failed"
 msgstr ""
 
-#: src/main/options.c:370
+#: src/main/options.c:373
 msgid "list files may not contain @ lines"
 msgstr ""
 
-#: src/main/options.c:391 src/main/options.c:393 src/main/options.c:807
+#: src/main/options.c:394 src/main/options.c:396 src/main/options.c:857
 msgid "process ID or pid:fd pair expected"
 msgstr "ожидался ИД процесса или пара ИДпр:ДФ"
 
-#: src/main/options.c:403 src/main/options.c:405 src/main/options.c:814
+#: src/main/options.c:406 src/main/options.c:408 src/main/options.c:864
 msgid "invalid process ID"
 msgstr "неправильный ИД процесса"
 
-#: src/main/options.c:448 src/pv/file.c:342
+#: src/main/options.c:475 src/pv/file.c:342
 msgid "failed to stat file"
 msgstr "не удалось получить информацию о файле"
 
-#: src/main/options.c:462
+#: src/main/options.c:511
 msgid "is a directory"
 msgstr "является каталогом"
 
-#: src/main/options.c:491
+#: src/main/options.c:541
 msgid "failed to generate sysfs filename"
 msgstr "не удалось создать имя файла sysfs"
 
-#: src/main/options.c:513
+#: src/main/options.c:563
 msgid "failed to read sysfs size file"
 msgstr "не удалось узнать размер файла sysfs"
 
-#: src/main/options.c:533
+#: src/main/options.c:583
 msgid "failed to open block device"
 msgstr "не удалось открыть блочное устройство"
 
-#: src/main/options.c:543
+#: src/main/options.c:593
 msgid "failed to determine size of block device"
 msgstr "не удалось определить размер блочного устройства"
 
-#: src/main/options.c:652
+#: src/main/options.c:702
 msgid "option structure allocation failed"
 msgstr "не удалось выделить память для структуры опций"
 
-#: src/main/options.c:671
+#: src/main/options.c:721
 msgid "option structure argv allocation failed"
 msgstr "не удалось выделить память для структуры опций argv"
 
-#: src/main/options.c:723
+#: src/main/options.c:773
 msgid "numeric value not understood"
 msgstr "число не распознано"
 
-#: src/main/options.c:743
+#: src/main/options.c:793
 msgid "integer argument expected"
 msgstr "ожидалось целое число"
 
-#: src/main/options.c:755
+#: src/main/options.c:805
 msgid "numeric argument expected"
 msgstr "ожидалось число"
 
-#: src/main/options.c:767
+#: src/main/options.c:817
 msgid "missing filename"
 msgstr ""
 
-#: src/main/options.c:795
+#: src/main/options.c:845
 msgid "missing process name"
 msgstr ""
 
-#: src/main/options.c:1056
+#: src/main/options.c:1106
 #, c-format
 msgid "Try `%s --help' for more information."
 msgstr "Выполните `%s --help' для получения подробностей."
 
-#: src/main/options.c:1058
+#: src/main/options.c:1108
 #, c-format
 msgid "Try `%s -h' for more information."
 msgstr "Выполните `%s -h' для получения подробностей."
 
-#: src/main/options.c:1089
+#: src/main/options.c:1139
 msgid ""
 "cannot use line mode or transfer modifier options when watching file "
 "descriptors"
 msgstr ""
 
-#: src/main/options.c:1098
+#: src/main/options.c:1148
 msgid "cannot use cursor positioning when watching file descriptors"
 msgstr ""
 
-#: src/main/options.c:1107
+#: src/main/options.c:1157
 msgid "cannot use remote control when watching file descriptors"
 msgstr "удалённое управление невозможно при отслеживании дескрипторов файлов"
 
-#: src/main/options.c:1116
+#: src/main/options.c:1166
 msgid "cannot use remote query when watching file descriptors"
 msgstr ""
 
-#: src/main/options.c:1125
+#: src/main/options.c:1175
 msgid "cannot transfer files when watching file descriptors"
 msgstr "передача файлов невозможна при отслеживании дескрипторов файлов"
 
-#: src/main/options.c:1150
+#: src/main/options.c:1200
 msgid "not available on systems without /proc/self/fdinfo"
 msgstr "невозможно на системах без /proc/self/fdinfo"
 
-#: src/main/options.c:1162
+#: src/main/options.c:1212
 msgid "cannot use remote control and remote query together"
 msgstr ""
 
-#: src/main/options.c:1189
+#: src/main/options.c:1239
 msgid "files cannot be specified with this option"
 msgstr ""
 
diff --git a/po/tr.po b/po/tr.po
index 480f9ca..54bf594 100644
--- a/po/tr.po
+++ b/po/tr.po
@@ -2,7 +2,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: pv 1.8.14\n"
 "Report-Msgid-Bugs-To: https://codeberg.org/ivarch/pv/issues\n"
-"POT-Creation-Date: 2025-12-15 20:10+0000\n"
+"POT-Creation-Date: 2026-03-07 22:21+0000\n"
 "PO-Revision-Date: 2025-10-05 20:09+0000\n"
 "Last-Translator: Oğuz Ersen <ersen@noreply.codeberg.org>\n"
 "Language-Team: Turkish <https://translate.codeberg.org/projects/pv/pv/tr/>\n"
@@ -294,81 +294,81 @@ msgstr "(giriş)"
 msgid "state allocation failed"
 msgstr "durum tahsisi başarısız oldu"
 
-#: src/main/options.c:370
+#: src/main/options.c:373
 msgid "list files may not contain @ lines"
 msgstr ""
 
-#: src/main/options.c:391 src/main/options.c:393 src/main/options.c:807
+#: src/main/options.c:394 src/main/options.c:396 src/main/options.c:857
 msgid "process ID or pid:fd pair expected"
 msgstr "süreç kimliği (ID) veya pid:fd çifti bekleniyor"
 
-#: src/main/options.c:403 src/main/options.c:405 src/main/options.c:814
+#: src/main/options.c:406 src/main/options.c:408 src/main/options.c:864
 msgid "invalid process ID"
 msgstr "geçersiz süreç kimliği (ID)"
 
-#: src/main/options.c:448 src/pv/file.c:342
+#: src/main/options.c:475 src/pv/file.c:342
 msgid "failed to stat file"
 msgstr "dosya statüsünde başarısız oldu"
 
-#: src/main/options.c:462
+#: src/main/options.c:511
 msgid "is a directory"
 msgstr "bir dizindir"
 
-#: src/main/options.c:491
+#: src/main/options.c:541
 msgid "failed to generate sysfs filename"
 msgstr "sysfs dosya adı oluşturulamadı"
 
-#: src/main/options.c:513
+#: src/main/options.c:563
 msgid "failed to read sysfs size file"
 msgstr "sysfs boyut dosyası okunamadı"
 
-#: src/main/options.c:533
+#: src/main/options.c:583
 msgid "failed to open block device"
 msgstr "blok aygıtı açılamadı"
 
-#: src/main/options.c:543
+#: src/main/options.c:593
 msgid "failed to determine size of block device"
 msgstr "blok aygıtının boyutu belirlenemedi"
 
-#: src/main/options.c:652
+#: src/main/options.c:702
 msgid "option structure allocation failed"
 msgstr "seçenek yapısı tahsisi başarısız oldu"
 
-#: src/main/options.c:671
+#: src/main/options.c:721
 msgid "option structure argv allocation failed"
 msgstr "seçenek yapısı argv tahsisi başarısız oldu"
 
-#: src/main/options.c:723
+#: src/main/options.c:773
 msgid "numeric value not understood"
 msgstr "sayısal değer anlaşılmadı"
 
-#: src/main/options.c:743
+#: src/main/options.c:793
 msgid "integer argument expected"
 msgstr "tamsayı bağımsız değişkeni bekleniyor"
 
-#: src/main/options.c:755
+#: src/main/options.c:805
 msgid "numeric argument expected"
 msgstr "sayısal bağımsız değişken bekleniyor"
 
-#: src/main/options.c:767
+#: src/main/options.c:817
 msgid "missing filename"
 msgstr ""
 
-#: src/main/options.c:795
+#: src/main/options.c:845
 msgid "missing process name"
 msgstr ""
 
-#: src/main/options.c:1056
+#: src/main/options.c:1106
 #, c-format
 msgid "Try `%s --help' for more information."
 msgstr "Daha fazla bilgi için `%s --help' seçeneğini deneyin."
 
-#: src/main/options.c:1058
+#: src/main/options.c:1108
 #, c-format
 msgid "Try `%s -h' for more information."
 msgstr "Daha fazla bilgi için `%s -h' seçeneğini deneyin."
 
-#: src/main/options.c:1089
+#: src/main/options.c:1139
 msgid ""
 "cannot use line mode or transfer modifier options when watching file "
 "descriptors"
@@ -376,31 +376,31 @@ msgstr ""
 "dosya tanımlayıcılarını izlerken satır modu veya aktarım değiştirici "
 "seçeneklerini kullanamaz"
 
-#: src/main/options.c:1098
+#: src/main/options.c:1148
 msgid "cannot use cursor positioning when watching file descriptors"
 msgstr "dosya tanımlayıcılarını izlerken imleç konumlandırmayı kullanamaz"
 
-#: src/main/options.c:1107
+#: src/main/options.c:1157
 msgid "cannot use remote control when watching file descriptors"
 msgstr "dosya tanımlayıcılarını izlerken uzaktan kumandayı kullanamaz"
 
-#: src/main/options.c:1116
+#: src/main/options.c:1166
 msgid "cannot use remote query when watching file descriptors"
 msgstr ""
 
-#: src/main/options.c:1125
+#: src/main/options.c:1175
 msgid "cannot transfer files when watching file descriptors"
 msgstr "dosya tanımlayıcıları izlenirken dosya aktarılamıyor"
 
-#: src/main/options.c:1150
+#: src/main/options.c:1200
 msgid "not available on systems without /proc/self/fdinfo"
 msgstr "/proc/self/fdinfo olmayan sistemlerde kullanılamaz"
 
-#: src/main/options.c:1162
+#: src/main/options.c:1212
 msgid "cannot use remote control and remote query together"
 msgstr ""
 
-#: src/main/options.c:1189
+#: src/main/options.c:1239
 msgid "files cannot be specified with this option"
 msgstr ""
 
diff --git a/src/include/config.h.in b/src/include/config.h.in
index cc54819..ca551ac 100644
--- a/src/include/config.h.in
+++ b/src/include/config.h.in
@@ -10,10 +10,10 @@
    language is requested. */
 #undef ENABLE_NLS
 
-/* Define to 1 if you have the `alarm' function. */
+/* Define to 1 if you have the 'alarm' function. */
 #undef HAVE_ALARM
 
-/* Define to 1 if you have the `basename' function. */
+/* Define to 1 if you have the 'basename' function. */
 #undef HAVE_BASENAME
 
 /* Define to 1 if you have the Mac OS X function
@@ -24,39 +24,42 @@
    the CoreFoundation framework. */
 #undef HAVE_CFPREFERENCESCOPYAPPVALUE
 
-/* Define to 1 if you have the `clock_gettime' function. */
+/* Define to 1 if you have the 'clock_gettime' function. */
 #undef HAVE_CLOCK_GETTIME
 
 /* Define if the GNU dcgettext() function is already present or preinstalled.
    */
 #undef HAVE_DCGETTEXT
 
-/* Define to 1 if you have the declaration of `SA_SIGINFO', and to 0 if you
+/* Define to 1 if you have the declaration of 'SA_SIGINFO', and to 0 if you
    don't. */
 #undef HAVE_DECL_SA_SIGINFO
 
-/* Define to 1 if you have the `dup2' function. */
+/* Define to 1 if you have the 'dup2' function. */
 #undef HAVE_DUP2
 
 /* Define to 1 if you have the <fcntl.h> header file. */
 #undef HAVE_FCNTL_H
 
-/* Define to 1 if you have the `fdatasync' function. */
+/* Define to 1 if you have the 'fdatasync' function. */
 #undef HAVE_FDATASYNC
 
-/* Define to 1 if you have the `fmod' function. */
+/* Define to 1 if you have the 'fmod' function. */
 #undef HAVE_FMOD
 
-/* Define to 1 if you have the `fpathconf' function. */
+/* Define to 1 if you have the 'fpathconf' function. */
 #undef HAVE_FPATHCONF
 
-/* Define to 1 if you have the `getcwd' function. */
+/* Define to 1 if you have the <ftw.h> header file. */
+#undef HAVE_FTW_H
+
+/* Define to 1 if you have the 'getcwd' function. */
 #undef HAVE_GETCWD
 
 /* Define to 1 if you have the <getopt.h> header file. */
 #undef HAVE_GETOPT_H
 
-/* Define to 1 if you have the `getopt_long' function. */
+/* Define to 1 if you have the 'getopt_long' function. */
 #undef HAVE_GETOPT_LONG
 
 /* Define if the GNU gettext() function is already present or preinstalled. */
@@ -89,52 +92,55 @@
 /* Define to 1 if you have the <math.h> header file. */
 #undef HAVE_MATH_H
 
-/* Define to 1 if you have the `memcpy' function. */
+/* Define to 1 if you have the 'memcpy' function. */
 #undef HAVE_MEMCPY
 
-/* Define to 1 if you have the `memmove' function. */
+/* Define to 1 if you have the 'memmove' function. */
 #undef HAVE_MEMMOVE
 
-/* Define to 1 if you have the `memrchr' function. */
+/* Define to 1 if you have the 'memrchr' function. */
 #undef HAVE_MEMRCHR
 
-/* Define to 1 if you have the `memset' function. */
+/* Define to 1 if you have the 'memset' function. */
 #undef HAVE_MEMSET
 
 /* Define to 1 if you have the <minix/config.h> header file. */
 #undef HAVE_MINIX_CONFIG_H
 
-/* Define to 1 if you have the `mkdir' function. */
+/* Define to 1 if you have the 'mkdir' function. */
 #undef HAVE_MKDIR
 
-/* Define to 1 if you have the `nanosleep' function. */
+/* Define to 1 if you have the 'nanosleep' function. */
 #undef HAVE_NANOSLEEP
 
-/* Define to 1 if you have the `posix_fadvise' function. */
+/* Define to 1 if you have the 'nftw' function. */
+#undef HAVE_NFTW
+
+/* Define to 1 if you have the 'posix_fadvise' function. */
 #undef HAVE_POSIX_FADVISE
 
-/* Define to 1 if you have the `posix_memalign' function. */
+/* Define to 1 if you have the 'posix_memalign' function. */
 #undef HAVE_POSIX_MEMALIGN
 
-/* Define to 1 if you have the `select' function. */
+/* Define to 1 if you have the 'select' function. */
 #undef HAVE_SELECT
 
-/* Define to 1 if you have the `setitimer' function. */
+/* Define to 1 if you have the 'setitimer' function. */
 #undef HAVE_SETITIMER
 
-/* Define to 1 if you have the `setlocale' function. */
+/* Define to 1 if you have the 'setlocale' function. */
 #undef HAVE_SETLOCALE
 
-/* Define to 1 if you have the `setproctitle' function. */
+/* Define to 1 if you have the 'setproctitle' function. */
 #undef HAVE_SETPROCTITLE
 
-/* Define to 1 if you have the `shmget' function. */
+/* Define to 1 if you have the 'shmget' function. */
 #undef HAVE_SHMGET
 
-/* Define to 1 if you have the `splice' function. */
+/* Define to 1 if you have the 'splice' function. */
 #undef HAVE_SPLICE
 
-/* Define to 1 if you have the `sqrtl' function. */
+/* Define to 1 if you have the 'sqrtl' function. */
 #undef HAVE_SQRTL
 
 /* Define to 1 if stdbool.h conforms to C99. */
@@ -149,10 +155,10 @@
 /* Define to 1 if you have the <stdlib.h> header file. */
 #undef HAVE_STDLIB_H
 
-/* Define to 1 if you have the `strchr' function. */
+/* Define to 1 if you have the 'strchr' function. */
 #undef HAVE_STRCHR
 
-/* Define to 1 if you have the `strerror' function. */
+/* Define to 1 if you have the 'strerror' function. */
 #undef HAVE_STRERROR
 
 /* Define to 1 if you have the <strings.h> header file. */
@@ -161,25 +167,25 @@
 /* Define to 1 if you have the <string.h> header file. */
 #undef HAVE_STRING_H
 
-/* Define to 1 if you have the `strlcat' function. */
+/* Define to 1 if you have the 'strlcat' function. */
 #undef HAVE_STRLCAT
 
-/* Define to 1 if you have the `strrchr' function. */
+/* Define to 1 if you have the 'strrchr' function. */
 #undef HAVE_STRRCHR
 
-/* Define to 1 if you have the `strstr' function. */
+/* Define to 1 if you have the 'strstr' function. */
 #undef HAVE_STRSTR
 
-/* Define to 1 if you have the `strtoul' function. */
+/* Define to 1 if you have the 'strtoul' function. */
 #undef HAVE_STRTOUL
 
-/* Define to 1 if `st_blksize' is a member of `struct stat'. */
+/* Define to 1 if 'st_blksize' is a member of 'struct stat'. */
 #undef HAVE_STRUCT_STAT_ST_BLKSIZE
 
-/* Define to 1 if `st_rdev' is a member of `struct stat'. */
+/* Define to 1 if 'st_rdev' is a member of 'struct stat'. */
 #undef HAVE_STRUCT_STAT_ST_RDEV
 
-/* Define to 1 if you have the `sysconf' function. */
+/* Define to 1 if you have the 'sysconf' function. */
 #undef HAVE_SYSCONF
 
 /* Define to 1 if you have the <sys/file.h> header file. */
@@ -218,7 +224,7 @@
 /* Define to 1 if you have the <unistd.h> header file. */
 #undef HAVE_UNISTD_H
 
-/* Define to 1 if you have the `vsnprintf' function. */
+/* Define to 1 if you have the 'vsnprintf' function. */
 #undef HAVE_VSNPRINTF
 
 /* Define to 1 if you have the <wchar.h> header file. */
@@ -227,7 +233,7 @@
 /* Define to 1 if you have the <wctype.h> header file. */
 #undef HAVE_WCTYPE_H
 
-/* Define to 1 if the system has the type `_Bool'. */
+/* Define to 1 if the system has the type '_Bool'. */
 #undef HAVE__BOOL
 
 /* Name of package */
@@ -254,12 +260,12 @@
 /* Signal handlers can determine the sending PID */
 #undef SIGINFO_PROVIDES_PID
 
-/* Define to 1 if all of the C90 standard headers exist (not just the ones
+/* Define to 1 if all of the C89 standard headers exist (not just the ones
    required in a freestanding environment). This macro is provided for
    backward compatibility; new code need not use it. */
 #undef STDC_HEADERS
 
-/* Enable extensions on AIX 3, Interix.  */
+/* Enable extensions on AIX, Interix, z/OS.  */
 #ifndef _ALL_SOURCE
 # undef _ALL_SOURCE
 #endif
@@ -320,11 +326,15 @@
 #ifndef __STDC_WANT_IEC_60559_DFP_EXT__
 # undef __STDC_WANT_IEC_60559_DFP_EXT__
 #endif
+/* Enable extensions specified by C23 Annex F.  */
+#ifndef __STDC_WANT_IEC_60559_EXT__
+# undef __STDC_WANT_IEC_60559_EXT__
+#endif
 /* Enable extensions specified by ISO/IEC TS 18661-4:2015.  */
 #ifndef __STDC_WANT_IEC_60559_FUNCS_EXT__
 # undef __STDC_WANT_IEC_60559_FUNCS_EXT__
 #endif
-/* Enable extensions specified by ISO/IEC TS 18661-3:2015.  */
+/* Enable extensions specified by C23 Annex H and ISO/IEC TS 18661-3:2015.  */
 #ifndef __STDC_WANT_IEC_60559_TYPES_EXT__
 # undef __STDC_WANT_IEC_60559_TYPES_EXT__
 #endif
@@ -353,35 +363,41 @@
 /* Number of bits in a file offset, on hosts where this is settable. */
 #undef _FILE_OFFSET_BITS
 
-/* Define for large files, on AIX-style hosts. */
+/* Define to 1 on platforms where this makes off_t a 64-bit type. */
 #undef _LARGE_FILES
 
-/* Define to empty if `const' does not conform to ANSI C. */
+/* Number of bits in time_t, on hosts where this is settable. */
+#undef _TIME_BITS
+
+/* Define to 1 on platforms where this makes time_t a 64-bit type. */
+#undef __MINGW_USE_VC2005_COMPAT
+
+/* Define to empty if 'const' does not conform to ANSI C. */
 #undef const
 
-/* Define to `int' if <sys/types.h> doesn't define. */
+/* Define as 'int' if <sys/types.h> doesn't define. */
 #undef gid_t
 
 /* Define to the type of a signed integer type of width exactly 32 bits if
    such a type exists and the standard includes do not define it. */
 #undef int32_t
 
-/* Define to `int' if <sys/types.h> does not define. */
+/* Define to 'int' if <sys/types.h> does not define. */
 #undef mode_t
 
-/* Define to `long int' if <sys/types.h> does not define. */
+/* Define to 'long int' if <sys/types.h> does not define. */
 #undef off_t
 
 /* Define as a signed integer type capable of holding a process identifier. */
 #undef pid_t
 
-/* Define to `unsigned int' if <sys/types.h> does not define. */
+/* Define as 'unsigned int' if <stddef.h> doesn't define. */
 #undef size_t
 
-/* Define to `int' if <sys/types.h> does not define. */
+/* Define as 'int' if <sys/types.h> doesn't define. */
 #undef ssize_t
 
-/* Define to `int' if <sys/types.h> doesn't define. */
+/* Define as 'int' if <sys/types.h> doesn't define. */
 #undef uid_t
 
 #include "config-aux.h"
diff --git a/src/main/options.c b/src/main/options.c
index f21d522..75c7832 100644
--- a/src/main/options.c
+++ b/src/main/options.c
@@ -31,6 +31,9 @@
 #ifdef HAVE_GETOPT_H
 #include <getopt.h>
 #endif
+#ifdef HAVE_FTW_H
+#include <ftw.h>
+#endif
 
 
 void display_help(void);
@@ -412,12 +415,36 @@ static bool opts_watchfd_parse(opts_t opts, const char *argument, /*@null@ */ co
 }
 
 
+#ifdef HAVE_NFTW
+/*
+ * Callback function for nftw() to add the size of the given file to the
+ * total size so far.
+ */
+static off_t dir_tree_file_size_so_far = 0;
+static int dir_tree_total_file_size( /*@unused@ */  __attribute__((unused))
+				    const char *fpath, const struct stat *sb, int typeflag, /*@unused@ */
+				    __attribute__((unused))
+				    struct FTW *ftwbuf)
+{
+	if (typeflag != FTW_F)
+		return 0;
+	if (NULL == sb)
+		return 0;
+	dir_tree_file_size_so_far += (off_t) (sb->st_size);
+	return 0;
+}
+#endif				/* HAVE_NFTW */
+
+
 /*
  * Set opts->size from the size of the file whose name is size_file,
  * returning false (and reporting the error) if there is a problem.
  *
  * If size_file points to a block device, the size of the block device is
  * used.
+ *
+ * If size_file points to a directory, opts->size is set to the sum of the
+ * sizes of all regular files under that directory, if nftw() is available.
  */
 static bool opts_use_size_of_file(opts_t opts, const char *size_file)
 {
@@ -456,6 +483,28 @@ static bool opts_use_size_of_file(opts_t opts, const char *size_file)
 		return true;
 	}
 
+#ifdef HAVE_NFTW
+	/* This was a directory - use the size of all files under it. */
+	if (S_ISDIR((mode_t) (sb.st_mode))) {
+		int rc_nftw;
+
+		dir_tree_file_size_so_far = 0;
+		/* TODO: get max fds rather than just using 1024. */
+		rc_nftw = nftw(size_file, dir_tree_total_file_size, 1024, 0
+#ifdef FTW_PHYS
+			       | FTW_PHYS
+#endif
+		    );
+
+		if (rc_nftw < 0) {
+			fprintf(stderr, "%s: %s: %s\n", opts->program_name, size_file, strerror(errno));
+			return false;
+		}
+
+		opts->size = dir_tree_file_size_so_far;
+		return true;
+	}
+#else				/* HAVE_NFTW */
 	/* This was a directory - report an error. */
 	if (S_ISDIR((mode_t) (sb.st_mode))) {
 		/*@-mustfreefresh@ *//* see above */
@@ -463,6 +512,7 @@ static bool opts_use_size_of_file(opts_t opts, const char *size_file)
 		return false;
 		/*@+mustfreefresh@ */
 	}
+#endif				/* !HAVE_NFTW */
 
 	/* This was not a block device - just use the size and return. */
 	if (!S_ISBLK((mode_t) (sb.st_mode))) {
diff --git a/tests/Modifiers_-_--size_from_dir_size.test b/tests/Modifiers_-_--size_from_dir_size.test
new file mode 100755
index 0000000..f2ae26b
--- /dev/null
+++ b/tests/Modifiers_-_--size_from_dir_size.test
@@ -0,0 +1,67 @@
+#!/bin/sh
+#
+# Similar to the "--size" check but, instead, using directory's size with
+# "--size @".
+
+# Allow all tests to be skipped, e.g. during a release build
+test "${SKIP_ALL_TESTS}" = "1" && exit 77
+
+true "${testSubject:?not set - call this from 'make check'}"
+true "${workFile1:?not set - call this from 'make check'}"
+true "${workFile2:?not set - call this from 'make check'}"
+
+# Process 100 bytes at 100 bytes per second, interval 0.1 seconds, with the
+# size set from a directory containing 10 files of $1/10 bytes, and
+# expecting a percentage of $2 at the end.
+sizeCheck () {
+	# Make a directory containing 10 files of $1/10 bytes each.
+	rm -rf "${workFile2}"
+	mkdir "${workFile2}"
+	mkdir "${workFile2}/subdir"
+	s="$1"
+	s=$((s/10))
+	for f in 1 2 3 4 5; do
+		dd if=/dev/zero bs="$s" count=1 2>/dev/null >"${workFile2}/$f"
+		dd if=/dev/zero bs="$s" count=1 2>/dev/null >"${workFile2}/subdir/$f"
+	done
+
+	# Run 100 bytes through the program, using the reference directory's
+	# total size as the percentage reference.
+	dd if=/dev/zero bs=100 count=1 2>/dev/null \
+	| "${testSubject}" -s "@${workFile2}" -n -i 0.1 -L 100 >/dev/null 2>"${workFile1}"
+
+	# If "-s @<directory>" is unsupported, skip the test.
+	if test $? -eq 64; then
+		rm -rf "${workFile2}"
+		echo 'not available on this build'
+		exit 77
+	fi
+
+	rm -rf "${workFile2}"
+
+	lineCount=$(wc -l < "${workFile1}" | tr -dc '0-9')
+	finalLine=$(sed -n '$p' < "${workFile1}")
+
+	# The number of output lines should be >5 and <13, and the final
+	# percentage should be $2.
+	#
+	if ! test "${lineCount}" -gt 5; then
+		echo "(reference size=$1) fewer than 6 output lines (${lineCount})"
+		exit 1
+	fi
+	if ! test "${lineCount}" -lt 13; then
+		echo "(reference size=$1) more than 12 output lines (${lineCount})"
+		exit 1
+	fi
+	if ! test "${finalLine}" = "$2"; then
+		echo "(reference size=$1): final percentage was not $2 (${finalLine})"
+		cat "${workFile1}"
+		exit 1
+	fi
+}
+
+sizeCheck 100 100
+sizeCheck 200 50
+sizeCheck 50 200
+
+exit 0